Home / 109,533.78-151,139.52-61,785.90

Finding the Fourth Proportional to 109,533.78, 151,139.52 and 61,785.90

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Solution

The fourth proportional to 109,533.78, 151,139.52 and 61,785.90 is: 85,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,533.78 : 151,139.52 = 61,785.90 : x
  2. Step 2: Convert to fraction form
    109,533.78/151,139.52 = 61,785.90/x
  3. Step 3: Cross multiply
    109,533.78x = 151,139.52 × 61,785.90
  4. Step 4: Simplify right side
    109,533.78x = 9,338,291,268.77
  5. Step 5: Solve for x
    x = 9,338,291,268.77/109,533.78
  6. Step 6: Final answer
    x = 85,254.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.